
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkRandom.h"

class HairCurvesView : public SampleView
    {
    public:
        HairCurvesView()
            {
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "HairCurves");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }


        virtual void onDrawContent(SkCanvas* canvas)
            {
            SkPaint paint;
            paint.setAntiAlias(true);
            paint.setStyle(SkPaint::kStroke_Style);
            paint.setStrokeWidth(-1);
            canvas->save();
            canvas->scale(1000 * SK_Scalar1, 1000 * SK_Scalar1);
            SkRandom rand;
            SkPath curves;
            SkPath hulls;
            SkPath ctrlPts;
            for (int i = 0; i < 100; ++i)
                {
                SkScalar pts[] =
                    {
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    rand.nextUScalar1(), rand.nextUScalar1()
                    };
                curves.moveTo(pts[0], pts[1]);
                curves.cubicTo(pts[2], pts[3],
                               pts[4], pts[5],
                               pts[6], pts[7]);

                hulls.moveTo(pts[0], pts[1]);
                hulls.lineTo(pts[2], pts[3]);
                hulls.lineTo(pts[4], pts[5]);
                hulls.lineTo(pts[6], pts[7]);

                ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
                ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
                ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
                ctrlPts.addCircle(pts[6], pts[7], SK_Scalar1 / 200);
                }
            for (int i = 0; i < 100; ++i)
                {
                SkScalar pts[] =
                    {
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    };
                curves.moveTo(pts[0], pts[1]);
                curves.quadTo(pts[2], pts[3],
                              pts[4], pts[5]);

                hulls.moveTo(pts[0], pts[1]);
                hulls.lineTo(pts[2], pts[3]);
                hulls.lineTo(pts[4], pts[5]);

                ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
                ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
                ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
                }
            for (int i = 0; i < 100; ++i)
                {
                SkScalar pts[] =
                    {
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    rand.nextUScalar1(), rand.nextUScalar1(),
                    };
                curves.moveTo(pts[0], pts[1]);
                curves.lineTo(pts[2], pts[3]);

                ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
                ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
                }

            paint.setColor(SK_ColorBLACK);
            canvas->drawPath(curves, paint);
            paint.setColor(SK_ColorRED);
            //canvas->drawPath(hulls, paint);
            paint.setStyle(SkPaint::kFill_Style);
            paint.setColor(SK_ColorBLUE);
            //canvas->drawPath(ctrlPts, paint);

            canvas->restore();
            }

    private:
        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new HairCurvesView;
    }
static SkViewRegister reg(MyFactory);

